Answer:
doctorate salary: d = $71,000
bachelor salary: b = $55,000
Explanation:
doctorate salary: d
bachelor salary: b
relationship between b and d: d = 2b - $39,000
Unfortunately, your "1 + 126,000" could not be correct. I'm going to assume that the total of the two salaries is $126,000. If that's the case, then:
bachelor salary + (2 times bachelor salary less $39,000) = $126,000. In symbols,
b + 2b - $39,000 = $126,000
Consolidating the 'b' terms results in 3b - $39,000 = $126,000, and so:
3b = $126,000 + $39,000 = $165,000
Dividing both sides by 3 yields the bachelor salary: b = $55,000
Then the doctoral salary is 2b - $39,000 = 2($55,000) - $39,000, or $71,000.
Check: Does b + (2b - $39,000) = $126,000? Yes.
Then the doctoral salary is d = $103,000, and the bachelor salary $29,000